Today, Doppler echocardiography is central to our ability to determine cardiovascular hemodynamics, especially in valvular heart diseases, noninvasively. Continuous-wave Doppler (CWD) plays a central diagnostic role in the diagnosis and management of patients with aortic stenosis. The development and use of CWD in aortic stenosis was due to the pioneering work of Dr. Liv Hatle and her outstanding medical and engineering colleagues in Norway. The author was fortunate to be the first to use the early CWD instruments in North America. Therefore, this article highlights key lessons learned: the importance and value of key contributions made by our engineering and young cardiology and sonographer colleagues, the key importance of the independent PEDOF CWD probe as well as use of the audio signal for accurate detection of high-velocity flows, and the value of CWD for the diagnosis and management of other cardiovascular conditions.

如今，多普勒超声心动图对于我们无创地确定心血管血流动力学（尤其是瓣膜性心脏病）的能力至关重要。连续波多普勒（CWD）在主动脉瓣狭窄患者的诊断和管理中起着重要的诊断作用。Liv Hatle博士及其挪威杰出的医学和工程学同事的开创性工作归功于主动脉瓣狭窄中CWD的开发和使用。作者很幸运成为北美最早使用早期CWD仪器的人。因此，本文重点介绍了一些重要的经验教训：我们的工程技术人员，年轻的心脏病学和超声医师的重要贡献的重要性和价值，独立的PEDOF CWD探头的重要性以及使用音频信号准确检测高血脂。速度流，